I had always thought that the terms "agglutinative" and "agglutination" referred to the typology of the inflection in a language.
But on another question here there seem to be a number of comments and answers where the terms are understood to refer to derivation, word-building.
Which of these two are relevant to the terms in question. Just the first, or a bit of both?
The question is actually about Esperanto, and some of the morphemes could well be analysed as either and/or both inflectional and derivational, since the language is so incredibly regular.